Hydrogen is one of the most abundant elements in the universe.
Lithium ION batteries are extremely popular right now, but Lithium
is limited and the energy density of Lithium ION batteries is nowhere
near the energy density of hydrogen. Hydrogen is not something that
people should be afraid of. As an energy carrier, hydrogen is ideal.
The chemical reaction that produces water can produce an electric
current with the use of an appropriate proton exchange membrane or
PEM fuel cell.

Critics say that fuel cells are fool cells and they claim that it
takes too much energy to liberate hydrogen. Fuel cells are more
efficient than internal combustion engines making up for some of the
energy that is lost to acquire the hydrogen where refining oil to
produce gasoline and diesel happens to be energy intensive also.

Solar to hydrogen technology is progressing rapidly, especially when salt
water is the source of the hydrogen. The salt acts as a catalyst.

The process to strip hydrogen from methane is 80% efficient
and releases significatly fewer green house gases than burning
gasoline or diesel.

Nuclear reactors that thermally crack water are an option. A
man who worked on the Apollo missions has suggested that a
fleet of nuclear powered ships crack sea water far from
population centers and come into port when they are full.

There is the possibility of hydrogen from algae which
is mentioned at Clean-air.org. Hydrogen can come from
biofuels which are carbon neutral. There are a growing
number of ways to procure hydrogen, some more efficient than
others with most being greenhouse gas emission free.

Chemical batteries, Lithium ION currently being the best
battery chemistry that there is, are heavy and their energy
density is limited. Worse, it takes hours to charge a
Lithium ION battery that is big enough to propel a car for
40 miles. If chemical batteries are so efficient, the space
they take up, their weight, and the time it takes to charge
them are major problems. What do you do with all the
batteries when they wear out? Lithium is limited where there
will likely be shortages within 10 years time.

Fuel cells are already lasting for 50k miles with new ones being
more durable. Platinum electrodes are being replaced by less expensive
carbon electrodes and other alloy electrodes, nickel iron cobalt for
example. Cobalt boride and ammonia borane together can be used to
release hydrogen on demand cheaply. Current production hydrogen fuel
cell cars with 5k and 10k PSI hydrogen tanks are able to travel 200
to 500+ miles on a single fill. These high pressure tanks scare
people, but they are safe.

Consider, it takes 300 billion gallons of water to refine all
the gasoline that all the light duty vehicles in the U.S. use where
it would take 100 billion gallons of water to collect enough hydrogen
via electrolysis for those vehicles if they were converted to be fuel
cell vehicles. Hydrogen is used to remove sulfur from oil that is
being refined into gasoline. Hydrogen is also used to produce
fertilizer. Hydrogen has been handled safely for at least three
centuries.

Oil rivaling what is available in the Middle East has been
discovered inside the United States, but burning this oil
releases GHGs and accelerates the greenhouse effect dangerously.
Water shortages, higher seas, draught, and more intense storms are
consequences of accelerating the greenhouse effect. Climate change
is real and besides this, Oil is valuable for more than just fuel.
Many computer/electronic devices/products contain plastic. In short,
buring Oil is both wasteful and harmful to the environment. Climate
change will be hard to reverse, especially if we don't stop the
burning of fossil fuels soon.